Determination of Bifurcation Angles of the Retinal Vascular Tree through Multiple Orientation Estimation based on Regularized Morphological Openings

Sandra Morales, Álvar-Ginés Legaz-Aparicio, Valery Naranjo, Rafael Verdú-Monedero

Abstract

This paper describes a new approach to compute bifurcation angles in retinal images. This approach is based on the estimation of multiple orientations at each pixel of a gray retinal image. The main orientations are provided by directional openings whose outputs are regularized in order to extend the orientation information to the whole image. The detection of vessel bifurcations is based on the coexistence of two or more than two different main orientations at the same pixel. Once the bifurcations and crossovers has been identified, bifurcation angles are calculated. The proposed procedure of computing bifurcation angles by means of orientation estimation at all pixels of the gray level image is much more stable than those methods which are based on the skeleton of the vascular tree, since a slight variation of a pixel of the skeleton can produce a significant change in the angle value.

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Paper Citation


in Harvard Style

Morales S., Legaz-Aparicio Á., Naranjo V. and Verdú-Monedero R. (2015). Determination of Bifurcation Angles of the Retinal Vascular Tree through Multiple Orientation Estimation based on Regularized Morphological Openings . In Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2015) ISBN 978-989-758-069-7, pages 126-131. DOI: 10.5220/0005170101260131


in Bibtex Style

@conference{biosignals15,
author={Sandra Morales and Álvar-Ginés Legaz-Aparicio and Valery Naranjo and Rafael Verdú-Monedero},
title={Determination of Bifurcation Angles of the Retinal Vascular Tree through Multiple Orientation Estimation based on Regularized Morphological Openings},
booktitle={Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2015)},
year={2015},
pages={126-131},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0005170101260131},
isbn={978-989-758-069-7},
}


in EndNote Style

TY - CONF
JO - Proceedings of the International Conference on Bio-inspired Systems and Signal Processing - Volume 1: BIOSIGNALS, (BIOSTEC 2015)
TI - Determination of Bifurcation Angles of the Retinal Vascular Tree through Multiple Orientation Estimation based on Regularized Morphological Openings
SN - 978-989-758-069-7
AU - Morales S.
AU - Legaz-Aparicio Á.
AU - Naranjo V.
AU - Verdú-Monedero R.
PY - 2015
SP - 126
EP - 131
DO - 10.5220/0005170101260131